/*
Copyright (c) 2023-forever Douglas Malnati. All rights reserved.

See the /faq/tos page for details.
    
(If this generated header is stamped on a file which is a 3rd party file or under a different license or copyright, then ignore this copyright statement and use that file's terms.)
*/

import { CandidateFilterBase } from './CandidateFilterBase.js';
import { NonRejectedOnlyFilter } from './WsprMessageCandidate.js';
import { CodecHeartbeat } from './CodecHeartbeat.js';
import { WSPR } from '/js/WSPR.js';


///////////////////////////////////////////////////////////////////////////
//
// Candidate Filter - Heartbeat
//
// Reject Heartbeat messages whose stated intended TX frequency does not
// match the searched-for channel frequency.
///////////////////////////////////////////////////////////////////////////

export class CandidateFilterHeartbeat
extends CandidateFilterBase
{
    constructor(t, band, channel)
    {
        super("Heartbeat", t);

        this.band = band;
        this.channel = channel;
        this.codecHeartbeat = new CodecHeartbeat();
    }

    OnFilterStart()
    {
        this.t.Event(`CandidateFilterHeartbeat Start`);
    }

    OnFilterEnd()
    {
        this.t.Event(`CandidateFilterHeartbeat End`);
    }

    FilterWindowAlgorithm(msgListList)
    {
        if (this.channel == "")
        {
            return;
        }

        let searchedFreqHz = WSPR.GetChannelDetails(this.band, this.channel).freq;

        for (let slot = 0; slot < 5; ++slot)
        {
            for (let msg of NonRejectedOnlyFilter(msgListList[slot]))
            {
                if (!msg.IsTelemetryExtended())
                {
                    continue;
                }

                let codec = msg.GetCodec();
                if (!this.codecHeartbeat.IsCodecHeartbeat(codec))
                {
                    continue;
                }

                let intendedFreqHz = this.codecHeartbeat.DecodeTxFreqHzFromBand(
                    this.band,
                    codec.GetTxFreqHzIdx(),
                );

                if (intendedFreqHz !== searchedFreqHz)
                {
                    msg.Reject(
                        this.type,
                        `Heartbeat intended frequency (${intendedFreqHz}) does not match searched channel frequency (${searchedFreqHz}).`
                    );
                }
                else if (msg.IsCandidate())
                {
                    msg.Confirm(
                        this.type,
                        `Heartbeat matches searched channel frequency (${searchedFreqHz}).`
                    );
                }
            }
        }
    }
}